Eight aspects teach you to identify the advantages and disadvantages of LED spotlights (three)

Six see kernel

Light source and drive is the heart and the head of the lamp, of course, the higher the better.

Light source brand is the basis of product quality. At this stage, the quality of foreign brands is still relatively dominant, and driven technology is relatively close to the main understanding of the country to obtain a mandatory certification CCC.

Light source and the driver of the warranty period of 3 years is generally good, the maintenance of its optical efficiency is generally required to reach more than 80%.

Figure: before the number of articles mentioned in light, light refers to the actual LED light effect will decrease with the increase of the junction temperature, so the choice of lamps, solder temperature should not exceed 85 degrees, in normal use, generally 3 years of decline is not more than 20%. We can see in the above picture, the middle of the Blu ray is the temperature resistance, durability of the best, which is why most of the current LED are added to the different colors of the blue phosphor by LED tune out the reasons.

Seven see structure

The layman's choice is usually the most easily overlooked part of the lamp, perhaps the structural design of lamps.

One of the most important factors mentioned in the kernel is the temperature of the lamp, so the cooling problem is a direct impact on the life of the lamp can not be ignored.

For the LED light source, the design scheme of heat dissipation fully reflects the effective heat treatment scheme of the chip installation, heat conduction, heat dissipation and air convection, which guarantees the most stable working state of the lamp.

Design of heat conduction and heat dissipation in lamp structure design

In the design of heat dissipation, heat conduction and heat dissipation is equivalent to a hot way of transportation, that is, how to transmit the heat emitted by the light source to the outside and then dissipate quickly.

Better conduction of heat needs to be done:

1, the use of good heat dissipation material, the effective export of heat (what a good thermal insulation materials, can refer to the following table);

2, chip installation and heat conduction glue adhesive roughness and porosity to reduce thermal resistance generated attention.

After the completion of heat transfer, how to quickly and effectively heat dissipation, need to consider:

1, the design of a reasonable volume and level of heat conduction, allowing smooth flow, increase the heat dissipation area;

2, efficient heat dissipation design, fully consider the ventilation convection, reduce heat radiation interference.

Left: the traditional fan cooling structure is widely used; right: after missing radiating structure improvement.

Eight see shape

The appearance of the party, in fact, this is the same as the color (color) standards, is a subjective evaluation.

In the design of lamps exposed, a portion of the lamp shape is architectural design, so how to collocation, depends entirely on the designer to control, to be sure, in this field, the high-end foreign brands lead the long-term situation is gradually broken.